John Leonhardt, RPA
NPI 1366644544 · Physician Assistant · Roslyn, NY
John Leonhardt, RPA is a Physician Assistant provider in Roslyn, NY (NPI 1366644544).
Provider details
- NPI number
- 1366644544
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RPA
- Sex
- Male
- Sole proprietor
- No
- License
- 002122 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Leonhardt's NPI number?
- John Leonhardt's National Provider Identifier (NPI) is 1366644544, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Leonhardt's specialty?
- John Leonhardt is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is John Leonhardt located?
- John Leonhardt's practice location on file with NPPES is 100 Port Washington Blvd, Roslyn, NY 11576.
- What is John Leonhardt's phone number?
- The practice phone number listed in the NPPES registry for John Leonhardt is (516) 562-6000.
- Is John Leonhardt's NPI active?
- Yes — John Leonhardt's NPI (1366644544) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.